如何使用php添加复选框值[关闭]

I need help with this one. My checkbox value doesnt submit.

<input name="helicopter" type="checkbox" value="<?php echo $aircraft->helicopter; ?>" checked="<?php
if ($aircraft->helicopter==1) {
                        echo "checked";
                }
?>"/>

Try this:

<input name="helicopter" type="checkbox" value="<?php echo $aircraft->helicopter; ?>" 
<?php
    if ($aircraft->helicopter==1) {
         echo "checked";
    }
?>>